Friction shock-absorbing mechanism



MIGZM 2 Sheets-Sheet 1 July 24, 1923.

Filed July 19. 1922 2 Shats-Sheet 2 vif ,Z9

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. f w Ma Patented `luly 24, 1923.

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JOHN F. OCONNOR, OF CHICAGO, ILLINOIS: ASSIGNOR TO WILLIAM H. MINER, 0F CHAZY, NEW YORK.

FRICTION SHOCK-ABSORBING MECHANISM.

Application filed July 19, `1922.

To all whom t may concern Be it known that l, JOHN F. OCoNNon, a citizen of the United Statesi residing at Chicago, in the county of Cook and State 'of Illinois, have invented a certain new and useful Improvement in Friction Shock-Absorbing Mechanisms, of which t-he following is a full, clear, concise, and exact description7 reference being had to the accompanyingdrawings7 forming a part of this specification. i

This invention relates to improvements in friction shock `absorbing mechanisms.

One object of the invention is to provide a high capacity friction shock absorbing mechanism especially adapted for"` railway draft riggings and wherein alarge amount of friction wearing areas is obtained.

More specifically, an object of the invention is to provide a friction mechanism of the character indica-ted wherein are employed twin arranged sets of friction generating devices combined with additional friction-creating elements all compactly arranged. y

Other objects of the invention will more clearly appear from the description and claims hereinafter following.

In the drawings forming a part of this specification, Figure 1 is a horizontal longitudinal sectional view of a portion of a railway draft rigging` showing my improvements in connection therewith. Figures 2 and 3 are vertical transverse sectional views of the shock absorbing mechanism proper, corresponding to the 'section lines- 2-2 and 3*3 respectively of Figure 1. Figure 4 is a longitudinal vertical sectional View, parts being broken away, corresponding to the section line 4 4 of Figure 1. Figure 5 is a broken horizontal longitudinall sectional view of the friction shell showing the interior construction thereof7 all .movable parts being omitted. And Figure l6 is a detail perspective of one of the friction plates or elements employed in the mechanism.

In the drawings forming a part of this specification, 10-10'denote theusual channel draft sills of a car underframe,.to the inner faces of which are secured front stop lugs 11 and rear.` stop lugs 12.v The 4shock absorbing mechanism proper is inserted within a hooded cast yoke 13 by which the mechanism is adapted to be operatively as- Serial No. 575,959.

sociated with the nsu'al drawbar, not shown. The yoke and mechanism therewithin are supported in operative position by a detachable saddle plate 14. f

The improved shock absorbing mechanism 'proper, as shown, comprises a. combined fricrrelatively movable friction plate F; and

twin arranged retainer bolt-s G-G- The casting A, as shown, is of rectangular form, having top yand bottom walls 15--15, side walls 16-16 and an integral rear wall 17, the latter functioning as the rear follower of the mechanism. The side walls 16-16 are comparatively short so as to leave the major portion of the casting open on the sides to permit of the insertion and removal of the springs and elements D-D The inner faces of the side walls 16 provide longitudinally extending friction surfaces 18-18 which are converged rearwardly of the mechanism. The top and bottom walls of the casting A are also provided with opposed sets of laterally spaced longitudinally extending ribs 19-19 at'the front or outer end thereof and also with opposed sets of top and bottom rearwardly converging ribs 20-20, as best `shown in Figure 5, for the purposes hereinafter described. i

Each of the wedge-pressure-transmitting friction shoes C has an outer flat bearing face 21 adapted to engare one of the stopy lugs 11 and also a part of the butt end of the coupler. Each said member C is further provided on its outer side with a longitudinally extending friction surface 22 co- Operable with the corresponding adjacent friction surface 18 and. at its inner end, with an inclined wedge surface 23. As shown in Figure 1, the two members C will together provide suflicient bea-ring area for the rear end of the coupler to admit ofproper operation of the mechanism. i v

Each of the wedge-friction-shoes D is provided on its inner side` that is, the side nearest the center line of the mechanism, with a longitudinally extending friction surfeg',

face 24 and also with an inclined wedge surface 25,v the (latter cooperating with corresponding adjacent wedge surface 23. At its inner end, each member D is recessed or cutasindicated at 26 to provide a seat for the inner end of the inner coil of the two-coil spring B. Each member D is further provided with a .laterally extended flange 27 at its inner end to thereby insuro a suiiiciently large bearing area for the outer heavy coil of the corresponding lspring Bv "The two lfriction plates E are of like construction' and each is formed with a rectangular platesection proper 28 estending-lengthwise of thermechanism and, on, opposite edges thereof, with `heavy lugs 294-29, thelatter having parallel lfront and .rear'faces 30 and 8l, which, when the plates E are in Vposition in the shell A, are in- ,c/lined rear'wardly and toward the center line of lthe mechanism. rfhe faces 3l cooperate with the front .faces of the ribs 20 'so that, as the plates "Fi tend to move rearwardly under the frictional drag imposed thereon by the twin sets of ljfriction elements the plateF the plates E will be pressed toward each other as they tend to travel down the inclined ribs 20-20. The faces v30 of the plates E are adapted to cooperate withthe linclined ends 19 eof the ribs 19 to prevent 'the plates ybeing moved youtwardly beyond 'their normal predetermined position. `The 'plate 'sections 28 `provide longi- 'tu'dinallyeitending friction surfaces on the inner and outer sides thereof cooperable with the `friction plate F and `friction sur- Jfaces 24, respectively. 1n normal position yofthe. "plates lE, the oiiter ends thereof extend flush with the outer end ofthe casting A The friction ,plate YF is a flat rectangular platee and is interposed between the two relatively stationary'friction plates E so as Y to provide'an intercalated friction plate arrangement. 'Said plate YF also slides between the sets of ribs 19--19 which act as guides therefor to limit the lateral play bf thefplaite F'. A't its outery'e'nd, the plate iF provided 'with 'a series of 'perforations,

-thi'jou'gh which are eXtendeda plurality of pins :S24-327,jthe extended vends of the pins 32 bfemg seated in sockets SiS- '33 provided the adjacent faces of the members C so that the plate F moves in unison with the inemberstl n'ot only in compression `but also 'inr'elea'sa thus insuring the "return of the pla'te IF tto its -nor'mal 4position when the A"ohther parts, of V'the friction mechanism arev V's'imrl'arly restored.

y The operation a's follows, assuming a mevedlinwardly relatively to the casting A, friction will ibe'generated on the surfaces V18 bers by the cent-ral intermediate partition to vmove toward each other, due to the longitudinal drag imposed upon said plates E by treason ofthe `'members D and plateF slittingA inwardly longitudinally of the plates E. Due tothe taper of the surfaces 1S, a slight differential action will be created, advancing the wedge-friction-shoes D longitudinally at alslightly faster rate than that of the members C. 'llheniovevment of all the'frictionelements referred to will be yieldingly resisted the twin springs EB, aslwillbe understood. Upon removal'ofthe actuatingV force, the members Caire free to collapse with respect tothe members sufiicientlyto permit thesprings D to proy ect the twin sets offricticn elements outwardly and as the latter -are forced outwardly,1the Aplate F will be retractedpinasvmuch as the pressure thereon will be `relieved because of the twin sets of friction devices.A From the preceding' description, "considered in connect-ion with thewdrawing, itl will he noted that the friction shell is in reality, divided into twin friction chamyformed by the'two plates E and that I. obtain additional frictional capacity by making the central partition in section separated to accommodate the plate F therebetween and without unduly enlarging the mechanism or weight oftheparts ,entering into it. y 4

I have herein shown and-described what I now consider theppreferred manner of carrying out the invention, but theV same yis merely illustrative "aandeel contemplateall changes and modifications that come within the` scope of the claims appended hereto.

iel. In a `friction shock `absorbing mechanism, the combination with a friction, shell divided into twin friction chambers by an intermediate multiple-element ,partition; of twin arranged friction means in `said chambers; a spring resistance; anda ,frictionl element between the twin e arranged friction means and movable with the latter, said friction element Yfrictionally cooperating with said elements of the partition,

to members of said twin friction means for retrac'ting said friction element during release.

3. Ina friction shock absorbing mechanism, the combination with' a friction shell divided into twin friction chambers by an intermediate multiple-element partition; of twin arranged spring means in said charnbers; a Vspring resistance; a friction element between the twin arranged friction means and movable with the latter, said friction element frictionally cooperating with said elements of the partition; and c0- operable rearwardly and inwardly directed wedging means on the shell and said partition elements arranged to press the latter toward each other upon tendency to move said partition elements inwardly of the shell.

4. In a friction shock absorbing mechanism, the combination with a friction shell; of a two-element intermediate partition within said shell dividing the latter into twin chambers, said partition elements being laterally separated; cooperable wedging means on the shell and said partition elements; a longitudinally movable friction pla-te slidable between and frictionally cooperable with said partition elements; fa spring resistance; and friction means in each of said chambers.

5. In a friction shock absorbing mechanism, the combination with a friction shell; of a plurality of alternated relatively longitudinally stationary and longitudinally movable friction plates carried by said shell; rearwardly and inwardly extending cooperable wedge faces on the shell and said movable friction plates adapted to increase the eective pressure between said stationary and movable friction plates during relative longitudinal'movement thereof during a compression stroke of the mechanism; and a spring resistance.

6. In a friction shock absorbing mechanism, the combination with a friction shell having opposed friction surfaces converging inwardly of the shell and an intermediate multiple-element partition dividing the shell into chambers; of twin arranged wedge-friction means in said chambers; a spring resistance; and a friction element between said twin arranged friction means and movable in unison with the latter, said friction element frictionally cooperating with said elements of the partition.

7. In a friction shock absorbing mechanism, the combination with a combined friction shell and spring cage casting; of a two-part intermediate partition within said shell, 'the parts of said partition being laterally separated; cooperable wedge means on said shell and said partition parts, said wedge means being directed inwardly of the mechanism; a set of wedge-frictioncreating means between said partition and each opposed friction surface of the shell; twin arranged spring resistances with'fin said cage portion of the casting; and a friction plate movable in unison with said twin arranged friction means and slidable between and frictionally cooperable with said partition elements.

In witness that I claim the foregoing I have hereunto subscribed my name this 1st day of July 1922.

JOI-IN F. OCONNOR.

Witnesses:

UNA C. Grasser, ANN BAKER. 

